631937 has 2 divisors, whose sum is σ = 631938. Its totient is φ = 631936.

The previous prime is 631931. The next prime is 631979. The reversal of 631937 is 739136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 430336 + 201601 = 656^2 + 449^2 .

It is a cyclic number.

It is not a de Polignac number, because 631937 - 2⁸ = 631681 is a prime.

It is not a weakly prime, because it can be changed into another prime (631931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315968 + 315969.

It is an arithmetic number, because the mean of its divisors is an integer number (315969).

2⁶³¹⁹³⁷ is an apocalyptic number.

It is an amenable number.

631937 is a deficient number, since it is larger than the sum of its proper divisors (1).

631937 is an equidigital number, since it uses as much as digits as its factorization.

631937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3402, while the sum is 29.

The square root of 631937 is about 794.9446521614. The cubic root of 631937 is about 85.8139569379.

The spelling of 631937 in words is "six hundred thirty-one thousand, nine hundred thirty-seven".